Fluid speed-governing mechanism.



T. GI-IIISMEFIl FLUID SPEED GOVERNING IVIECHANISIVI.

APPLICATION FILED IAN. 24\ 1916.

Pateted Aug. 21, y1917'.

v1/mmf? Meade/"e Germ/77er f' ATTORNEY UNITED: sTATEs Parleur onirica?'.LHEODORENSMER, 0F MINNEAPOLIS, MINNESOTA.

FLUID SPEED-GOVERNING MECHANISM.

i To all whom it may concern.'

A.Be it known that I, THEoDonn GnNsMER,

` a citizen of the United Sta-tes, and a resident of Minneapolis,Minnesota, have invented a new and useful Improvement in' Fluidrectly bya prime mover such as a gas-engine or electric motor', and the drivenmember connects with the traction wheels or other element from' whichthe power is taken oif.

The main object of my. invention is to provide an Aimproved form ofspeed governing'mechanism, in which the speed of the driven member maybe varied from zero to maximum, and this accomplished without the useoit' either sliding, planetary or fric# tion gears. It will be apparentthat because the transmission can be reduced to zero, the

.a preferred mechanism; Fig. `5 is a plan View of the device will alsoserve as a clutch. Another object of my linvention is to provide anabsolutely noiseless transmission mechanism, and also a convenient meansfor controlling'the same..Y

In the accompanying drawings: v. Figure' l `is a side elevation of mydevice,

part being shown i`n section;

Fig. 2 is a diametrical section of one `of the` pistons Fig. 3 is a plan.view of the piston shown in Fig. 2; Fio'. a sectional view showingForm' of' piston valve operating valve and valve stem shown in Fig. 4,and Fig. 6 is a fragmental side elevation of the yoke connecting the,opposed pistons.

In the construction shown in these drawings, a represents a drive shaftprovided with a crank b and end c. Said shaft is mounted in a bearing c,which is supported by the transverse channel member d of the supportingframe. A. driven shaft e is mounted in a bearing f, the latter being sup,ported by the channel member g'. The

shafts 0, -e -are journaled in longitudinal alinelnent and thetransmlsslon mechanism of my invention is adaptedv to.co`nnect the two.Rigidly mounted-on the shaft c is a hub Z, bearinv spider arms h whichsupport the radial cy inders i, which Aare shown as l Specification ofLetters Patent. :Patented Aug, 21, 1917', Application filed JanuaryV24v, 1916.- Serial No. 74,040. i

located diametrically opposite each other. A hub j and spider arms areintegrally'l formedwith the cylinders z', and the shaft a is rotatablymounted in the hub j. .The extreme end if: of the shaft a is rotatablymounted in the hub Z adjacent the end of the shaft e. The cylinders iare provided at -opposite'ends with the Huid-tight stuffing in whichslot the crank I) has a bearing. It A will thus be seen that therevolutions of the shaft a will reciprocate the piston rod p so as tomove thepistons o always in the same direction. Thel pistons o areprovided with i longitudinal ports 41 A(see Fig. 2) and, adjacent theouter face of said piston'is a plate 8,-.

provided with port holes t, adapted to cover the ports 7" when saidplate is rotated. The plate s is rotatable with respect to the pis- Yton, but has no longitudinal movement relaextends into the hollow pistonrod. The

tive thereto, being held in place by a Spanner nut a, which is adaptedto thread into a tappedl recess of said piston. The nut u is providedwith ports o, which are in alinement with the ports 1', and when theplate s has been rotated so as to bring the ports t in alinement withthe ports'r, o, fiuid will readily bypass from one end of the cylinderto the other.' Piston rings are inserted bel tween the plate .sand; thepiston face so as to prevent leakage between these parts. A valve stem w-is rigidly fixed to the valve .plate s, being in longitudinal'alinementwith the piston rod p and projecting through the outer end of thecylinder. On the'outer end of each valve/"stem w is an operating lever'which consists of a pin af; fixed laterally in said stem. Keyed on thehub Z is a collar 3/,

adapted to be moved forward by a shifter lever z', which is pivoted at 2in a bracket 3, 'the latter made integral 'with the bearing f.' Thecollar 1/ is provided with radial arms 4: the extremities of which arecurved, as at 5, and provided with slots 6, which are parallel with thelongitudinal axis of the cylinders; The pins a; project through saidslots..y f i In Figs. 4 and 5 I have shown 'apreferred form of valveoperating mechanism. In this form the piston rod .77 is madegh'olin thecylinder' head, and its inner end f low, the valve stem lw is rotatablymountedE i `valve s is of the same construction and arrangement in thepiston as shown in Fig. 2, but instead of being rigid on the stem `w itis provided with a key s2, running in a `keyway w? of said stem. In thisway, the

i' piston is allowed free travel, but by rotating the valve stem thevalve will be operated.

AS- a means for rotating the' valve stem fw ioI "I, providev on itsouter end a full shrouded ar 7. Each radial-arm 4 is provided atlts'outer end with a rack S, meshing with the gear 7, and adapted t'orotate the lat- 4 ter and therewith the valve stem w when .ever theshifter lever e' is operated.

This form of Valve o erating mechanism is'preferable because t 1e entiredevice will be more dompact and not take up as much space as "thctypeshown in'Fig. 1.

.close the piston ports, the fluid will bypass more slowly and thereciprocations Aof the l piston-rod will be slower, thereby transmittinga certain speed of rotationto th'e shaft e. When the ports are entirelyclosed the pistons will beheld stationary at any point 1n the cylindersto which they may have been moved, and a constant speed equal to thespeed of the drive-shaft, a, will beI transmitted from the saiddrive-shaft, a, to the driven shaft e.

I claim: f i

1. In a fluid speed governing mechanism, a shaft, radial fluid cylindersfixed on said shaft, pistons reciprocable within said cylinders, a crankshaft, connections between the crank shaft and the pistons forreciproeating the, latter synchronously in the same direction, means forby-passing the fluid to opposite. sides of the pistons, said meanscomprising valve members mounted in the pistons, and operating means forsaid valve members,said means operable during the revolution of thecylinders.

2. In a fluid speed governing mechanism,

` a shaft, radial fluid cylindersfixed on said "shaft,-pistonsreciprocable within said cylinders, a. rigid piston rod connecting saidpi ons and provided with a yoke, a crankshaft, connections between thecrank shaft and the yoke for rec1procating the pistons synchronously 1nthe same direction, and

means for by-passing the fluid to opposite' sides of the pistons, saidmeans comprising Vy valve members mounted in the pistons.

3. In a fluid speed governing mechanism, a durft, radial fluid cylindersfixed on said shaft, pistons reciprocable within said cylmders, a rigidpistonrod connecting said pistons and provided with a yoke, a crankshaft, connections between the crank shaft and the yoke forreciprocating the pistons synchronously in the same direction, means forby-passing the fluid to opposite sides of the pistons, said meanscomprising valve members mounted in the pistons, and operating means forsaid valve members, said means operable during the revolution of thecylinders.

4. In a device of the character described, a radial revoluble fluidcylinder, a piston reciprocable therein, said piston vprovided withlongitudinal ports, a valve member nibunted in the piston and adapted tocontrol the opening of said ports, a rotatable valve stem projectingTlongitudinally through the cylinder head and slidably connected withsaid valve member, and means for rotating said valve stem during therevolution of the cylinder, said means comprisingr a member laterallymovable with respect to the cylinder.

5. In a device of the character described,

a radial revoluble fluid cylinder, a piston rcciprocable therein, saidpiston provided with longitudinal ports, a valve member mounted in theiston and` adapted to control the opening ofo said ports, a rotatablevalve stem projecting longitudinally through the cylinder and slidablyconnected with said valve member, an operating gear on the outer end ofsaid stem, and means for rotating said operating gear during therevolution of the cylinder, said means comprising a member laterallymovable with respect to the cylinder.

6. In a device of the character described, a radial revolublc fluidcylinder, a piston re.- ciprocable therein, said piston provided withlongitudinal ports,- a valve member mounted in the piston and adapted tocontrol the opening of said ports, a rotatable valve steln projectinglongitudinally through the cylinder head and slidably connected withsaid valve member, an operating gear on the outer end of said stem,means for rotating said operating gear during the revolution ol thecylinder, said means comprising a mem berlaterally movable with respectto the cylinder, and a rack on said member engaging with the valveoperating gear.

7. In a device of the character described,

a radial revoluble fluid cylinder, a piston reciprocable therein, saidpiston provided' with lonr'tudinal ports, a Valve member mounted in t,4el piston and adapted to control the opening of said ports, a rotatablevalve stem projecting longitudinally through the cylinder head andslidably connected with said ,valve member, an operating gea-r 'on theouter end of said stem, means for rotating said operating..I gear duringthe revolution of.

the cylinder, saidmeaus comprising a member laterally movable withrespect to thecylf Vlao index', a 'rack on said member engaging with thevalve operating gear, and" ineen@ moving said member laterally.

8. In a device of the character desoribed, a radial i'evoluhle fluidcylinder, a piston i'eciproeable therein, said piston provided withlongitudinal ports and a hollow piston iod, a valve member mounted inthe piston and adapted to control the opening of said ports. a iotataiie.v'alve Stem projecting longitudinally through the cylinder head intothe hollow piston rod and Slidahly connected with said valve-member, andmeans for i'otating said valve stem dui-ing the revolution of thecylinder.

i). In a device of the character described,-

a radial ievoluble fluid cylinder, a piston iei-iproealile therein, saidpiston provided with longitudinal ports and a hollow piston i-od, avalve member mounted in the piston :ai-id j wted to control the opening0f Said pei Lsziid Xailye irieinyber being made v'vith a i l gllcey, :ale .Whg gtern proJectthe ,ey iiider eed into the hollow .in g1g@ andprovided with a keydvafv in fw i the of the valve member is adapte 'tolld; {il} Qpeatmg guai' on the outer end of .Said @im means for rotatingsaid .operating gear during the revolution of the @finden sind meineinmprising a member lfiteiflly IRQ-Willi@ Wlil respect to'the cylinder,a i'ziek on .said merry her engaging with the valve operating gear? andmeans for moving said member laterally.

THE( )DORE i gg iongiliidim

